US7733034B2 - Single inductor serial-parallel LED driver - Google Patents
Single inductor serial-parallel LED driver Download PDFInfo
- Publication number
- US7733034B2 US7733034B2 US11/790,221 US79022107A US7733034B2 US 7733034 B2 US7733034 B2 US 7733034B2 US 79022107 A US79022107 A US 79022107A US 7733034 B2 US7733034 B2 US 7733034B2
- Authority
- US
- United States
- Prior art keywords
- led
- voltage
- current
- string
- strings
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/40—Details of LED load circuits
- H05B45/44—Details of LED load circuits with an active control inside an LED matrix
- H05B45/46—Details of LED load circuits with an active control inside an LED matrix having LEDs disposed in parallel lines
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/38—Switched mode power supply [SMPS] using boost topology
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
Description
where VREF1=
Claims (18)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/790,221 US7733034B2 (en) | 2006-09-01 | 2007-04-24 | Single inductor serial-parallel LED driver |
US12/790,273 US20110018451A1 (en) | 2006-09-01 | 2010-05-28 | Single Inductor Serial-Parallel LED Driver |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US84154306P | 2006-09-01 | 2006-09-01 | |
US11/790,221 US7733034B2 (en) | 2006-09-01 | 2007-04-24 | Single inductor serial-parallel LED driver |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/790,273 Continuation US20110018451A1 (en) | 2006-09-01 | 2010-05-28 | Single Inductor Serial-Parallel LED Driver |
Publications (2)
Publication Number | Publication Date |
---|---|
US20080054815A1 US20080054815A1 (en) | 2008-03-06 |
US7733034B2 true US7733034B2 (en) | 2010-06-08 |
Family
ID=39150531
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/790,221 Expired - Fee Related US7733034B2 (en) | 2006-09-01 | 2007-04-24 | Single inductor serial-parallel LED driver |
US12/790,273 Abandoned US20110018451A1 (en) | 2006-09-01 | 2010-05-28 | Single Inductor Serial-Parallel LED Driver |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/790,273 Abandoned US20110018451A1 (en) | 2006-09-01 | 2010-05-28 | Single Inductor Serial-Parallel LED Driver |
Country Status (1)
Country | Link |
---|---|
US (2) | US7733034B2 (en) |
Cited By (27)
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US20090195191A1 (en) * | 2008-02-05 | 2009-08-06 | Shui-Mu Lin | Perceptually linear LED brightness control |
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US20090284174A1 (en) * | 2006-05-02 | 2009-11-19 | Koninklijke Philips Electronics N V | Light emitting diode circuit and arrangement and device |
US20100219759A1 (en) * | 2009-02-27 | 2010-09-02 | Li-Chieh Chen | Short-circuit detection method and related circuit |
US20110018451A1 (en) * | 2006-09-01 | 2011-01-27 | Broadcom Corporation | Single Inductor Serial-Parallel LED Driver |
US20110204817A1 (en) * | 2010-02-22 | 2011-08-25 | Han Hee Seok | Light source driver, method of driving the same and devices including the same |
US20110221346A1 (en) * | 2010-11-23 | 2011-09-15 | O2Micro, Inc. | Circuits and methods for driving light sources |
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US20120293215A1 (en) * | 2011-05-17 | 2012-11-22 | Ching-Tsan Lee | Driving circuit having current balancing functionality |
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